CLIMATE AND SPECIES. 9 
The spring flowering group includes all those species which 
possess the habit of storing up nutriment beforehand, by which 
they are able to make an early start in the following season, of 
which may be mentioned as instances, Anemone, Ficaria, Brassica, 
Tussilago, Arum, bulbs, tuberous plants as Orchids, and most 
trees and shrubs, and several wind fertilized plants, such as 
Thalictrum, Poterium, Mercurialis, Salix, Carices, Gramina. The 
summer flowering group, it will be observed, outnumber all the 
rest put together. It might be expected that in the warmer 
part of the year the greatest number would reach maturity, but, 
physically, it is the lack of stored nutriment and the vegetative 
work, which has in consequence to be got through in order to 
supply it, which delays their flowering till spring is over. The 
ability of the fourth group to prolong their flowering period may 
be due to their greater vital force and hardihood; they are 
mostly spring and sunimer flowerers, and only a very few include 
any part of winter or autumn in their period. 
